CN104036172B - Fingerprint recognition detection components and its electronic installation - Google Patents
Fingerprint recognition detection components and its electronic installation Download PDFInfo
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- CN104036172B CN104036172B CN201410313528.4A CN201410313528A CN104036172B CN 104036172 B CN104036172 B CN 104036172B CN 201410313528 A CN201410313528 A CN 201410313528A CN 104036172 B CN104036172 B CN 104036172B
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- 230000003666 anti-fingerprint Effects 0.000 claims description 4
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Classifications
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/12—Fingerprints or palmprints
- G06V40/13—Sensors therefor
- G06V40/1318—Sensors therefor using electro-optical elements or layers, e.g. electroluminescent sensing
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F21/30—Authentication, i.e. establishing the identity or authorisation of security principals
- G06F21/31—User authentication
- G06F21/32—User authentication using biometric data, e.g. fingerprints, iris scans or voiceprints
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- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Computer Security & Cryptography (AREA)
- Physics & Mathematics (AREA)
- Software Systems (AREA)
- General Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Human Computer Interaction (AREA)
- Multimedia (AREA)
- Image Input (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
- Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
Abstract
Present invention is disclosed fingerprint recognition detection components and its electronic installation, wherein, fingerprint recognition detection components include：Substrate, the side with the first face, second face corresponding with the first face and the first face of connection and the second face；Flexible substrate, is arranged on the first face of substrate, and extend to the second face of substrate along the side bending of substrate and be covered in the second face of substrate at least in part；Touch element, is arranged in flexible substrate, and positioned at the second face of substrate；Fingerprint detection element, is arranged in flexible substrate, and positioned at the first face of substrate；And lead, it is arranged in flexible substrate, one end electrical connection fingerprint detection element of lead, the other end extends to the second face of substrate, the present invention can realize fingerprint recognition, and need not be by physical button, but carry out fingerprint recognition on the non-display area transparent cover plate of such as display screen, the practical application of fingerprint recognition is extended, be particularly suitable for use in Android mobile phone without entity HOME keys etc..
Description
Technical field
The present invention relates to fingerprint recognition field, particularly a kind of fingerprint recognition detection components and with fingerprint recognition inspection
Survey the electronic installation of component.
Background technology
With extensive use of the portable terminal in people's daily life, the function of present portable terminal is increasingly
It is powerful, and this diversified function facilitates user.But, portable terminal is providing the user the same of more conveniences
When, too many personal information is carried, if this portable terminal is once lose or stolen, these information are not due to having
Related protection is carried out, therefore is easy to let out, is made troubles to user.Therefore, some guarantors are on portable terminal
The setting of close aspect seems very necessary.
The function of keeping secret of traditional portable terminal for possessing touch-screen is that such as keyboard is set on portable terminal nothing but
The software functions such as lock, and realize by inputting password secrecy.This traditional portable terminal for possessing touch-screen, usual key
Disk lock is protrusively provided edge side in portable terminal in button form, thus user grab pinch portable terminal when or be not intended to
Between can press keypad lock, so as to drive portable terminal, consume the electricity of portable terminal.Also, due in portable terminal
Edge side be provided with keypad lock so that give it is unsmooth, it is irregular feel, reduce portable terminal exterior quality.
Meanwhile, when by inputting password to realize secrecy, password is inputted every time, therefore seem cumbersome, and also password holds
Easily being cracked causes function of keeping secret to fail.
The content of the invention
It is an object of the invention to provide a kind of fingerprint recognition detection components and with the fingerprint recognition detection components
Electronic installation, is realizing fingerprint recognition such as portable terminal on electronic installation.
According to an aspect of the present invention there is provided a kind of fingerprint recognition detection components, including：
Substrate, the second face with the first face, corresponding with first face and connects first face and described the
The side in two faces；
Flexible substrate, is arranged on the first face of the substrate, and extend to the substrate along the side bending of the substrate
The second face and be covered in the second face of the substrate at least in part；
Touch element, is arranged in the flexible substrate, and positioned at the second face of the substrate；
Fingerprint detection element, is arranged in the flexible substrate, and positioned at the first face of the substrate；And
Lead, is arranged in the flexible substrate, and one end of the lead electrically connects the fingerprint detection element, the other end
Extend to the second face of the substrate；
Wherein, the fingerprint detection element includes：
First induction electrode；
A plurality of first driving electrodes, a plurality of first driving electrodes are arranged side by side and are spaced apart from each other, and described a plurality of
One driving electrodes are relative to form multiple first detector gaps at interval with first induction electrode respectively；
Second induction electrode, be arranged in parallel with first induction electrode and be located at first induction electrode with it is described
The opposite side of a plurality of first driving electrodes；
A plurality of second driving electrodes, a plurality of second driving electrodes are arranged side by side and are spaced apart from each other, and described a plurality of
Two driving electrodes are relative to form multiple second detector gaps at interval with second induction electrode respectively, and described a plurality of the
Two driving electrodes are arranged in correspondence with second induction electrode and the described first sensing with a plurality of first driving electrodes
The opposite side of electrode.
Preferably, the fingerprint detection element also includes the first reference electrode and the second reference electrode, first reference
Electrode is abreast oppositely arranged with first induction electrode and driven positioned at first induction electrode with described a plurality of first
The opposite side of moving electrode, second reference electrode and second induction electrode are abreast oppositely arranged and positioned at described the
The side opposite with a plurality of second driving electrodes of two induction electrodes.
Preferably, the fingerprint detection element also includes a plurality of first illusory driving electrodes and a plurality of second illusory driving electricity
Pole, a plurality of first illusory driving electrodes are arranged side by side and are electrically connected to each other, a plurality of first illusory driving electrodes and institute
A plurality of first driving electrodes are stated to be arranged in correspondence with the side opposite with first induction electrode of first reference electrode,
The a plurality of second illusory driving electrodes are arranged side by side and are electrically connected to each other, a plurality of second illusory driving electrodes with it is described many
The driving electrodes of bar second are arranged in correspondence with the side opposite with second induction electrode of second reference electrode.
Preferably, the pitch between the pitch and adjacent second driving electrodes between adjacent first driving electrodes is equal to each other
And in 50 to 60 μ ms；The width of first driving electrodes and the width of the second driving electrodes are equal to each other and at 20 to 45 μm
In the range of；The size of first detector gap and the second detector gap is equal to each other and in 20 to 40 μ ms.
Preferably, the touch element at least includes
Second light transmission conductive layer, is formed in the flexible substrate, including many strip electrodes arranged in parallel in the first direction
Lead；
The first base material, is formed in second light transmission conductive layer；And
First light transmission conductive layer, is formed in the first base material, including many strip electrodes arranged in parallel in a second direction
Lead；
Wherein, second light transmission conductive layer and fingerprint detection element are located between the first base material and flexible substrate
Same layer.
Preferably, the fingerprint detection element is with the flexible substrate, from the first face of the substrate along the substrate
Side bending extends to the second face of the substrate.
Preferably, the induction electrode of the fingerprint detection element and pattern at least a portion of driving electrodes formation are by conduction
Grid is constituted.
Preferably, the fingerprint detection element and lead are formed in flexible substrate by way of sputter or silk-screen.
Preferably, form fluted in the flexible substrate, the fingerprint detection element is arranged in the groove.
Preferably, the first face of the substrate and side are equipped with the concave station of the accommodating flexible substrate.
Preferably, in addition to a fingerprint recognition chip, the flexible substrate in the second face of the substrate, the fingerprint are arranged at
The coupling that identification chip is moved to user between finger and the fingerprint detection element is sensitive.
Preferably, the first adhesive layer is provided between the flexible substrate and the first face of the substrate；The flexible substrate
The second adhesive layer is provided between the second face of the substrate.
Preferably, the touch element is located between the flexible substrate and substrate.
Preferably, in addition to a protective layer, scratch in the first face at least covering the fingerprint detection element and the substrate
Property base material, the protective layer is that class bores carbon plated film or high anti-fingerprint AF films thoroughly.
According to another aspect of the present invention, a kind of electronic installation with fingerprint recognition detection function is also provided, including
Above-mentioned fingerprint recognition detection components.
Preferably, the substrate is the transparent cover plate of touch display screen, and the fingerprint detection element is arranged at the touch
The non-display area of display screen.
According to technical scheme disclosed by the invention, it is possible to achieve realizing fingerprint on electronic installation such as portable terminal
Identification, and need not be by physical button, but fingerprint recognition is carried out on the non-display area transparent cover plate of such as display screen, expand
The practical application of fingerprint recognition is opened up, be particularly suitable for use in Android mobile phone without entity HOME keys etc..
Brief description of the drawings
Its example embodiment is described in detail by referring to accompanying drawing, above and other feature of the invention and advantage will become
It is more obvious.
Fig. 1 is the electronic installation in embodiments of the invention 1 for fingerprint recognition detection；
Fig. 2 is the profile in S regions in Fig. 1；
Fig. 3 is the profile of substrate in Fig. 2；
Fig. 4 is the top view of substrate in Fig. 2；
Fig. 5 is the first circuit theory diagrams of fingerprint detecting element in the embodiment of the present invention；
Fig. 6 is second of circuit theory diagrams of fingerprint detecting element in the embodiment of the present invention；
Fig. 7 is the third circuit theory diagrams of fingerprint detecting element in the embodiment of the present invention；
Fig. 8 is the 4th kind of circuit theory diagrams of fingerprint detecting element in the embodiment of the present invention；
Fig. 9 is the profile in the manufacturing process of the electronic installation detected in embodiments of the invention 2 for fingerprint recognition；
And
Figure 10 is the profile of the electronic installation detected in embodiments of the invention 2 for fingerprint recognition.
Wherein, description of reference numerals is as follows：
1 substrate
The faces of a first
The faces of b second
C sides
1a, 1c concave station
2 flexible substrates
3rd, 3 ', 300 ', 300 " fingerprint detection element
4 leads
5 fingerprint recognition chips
6 protective layers
7 filling glue
8 protection bases
9 Anisotropically conductive materials
10 mainboards
11 first adhesive layers
12 second adhesive layers
13 touch elements
100 substrates
101 first substratum transparents
102 first light transmission conductive layers
103 the first base materials
104 second substratum transparents
105 second light transmission conductive layers
106 flexible substrates
107 second base materials
108 Anisotropically conductive materials
109 mainboards
110 fingerprint detection elements
111 bonding coats
112 protective layers
30 drive circuits
31 induction electrodes
32 driving electrodes
33 reference electrodes
34 illusory driving electrodes
35 detector gaps
36 gaps
37 difference filters
38 difference amplifiers
39 wires
H finger glide directions
300 drive circuits
301 fingerprint sensing regions
302 first driving electrodes
303 first induction electrodes
304 first reference electrodes
305 first illusory driving electrodes
306 first detector gaps
307 difference filters
308 difference amplifiers
309 second driving electrodes
310 second induction electrodes
311 second reference electrodes
312 second illusory driving electrodes
313 second detector gaps
314 difference filters
315 difference amplifiers
Embodiment
Example embodiment is described more fully with referring now to accompanying drawing.However, example embodiment can be with a variety of shapes
Formula is implemented, and is not understood as limited to embodiment set forth herein；On the contrary, thesing embodiments are provided so that the present invention will
Fully and completely, and by the design of example embodiment those skilled in the art is comprehensively conveyed to.Identical is attached in figure
Icon note represents same or similar structure, thus will omit repetition thereof.
Described feature, structure or characteristic can be combined in one or more embodiments in any suitable manner
In.Embodiments of the present invention are fully understood so as to provide there is provided many details in the following description.However,
One of ordinary skill in the art would recognize that, without one or more in the specific detail, or using other methods, group
Member, material etc., can also put into practice technical scheme.In some cases, it is not shown in detail or describes known features, material
Material operates to avoid the fuzzy present invention.
The accompanying drawing of the present invention is only used for signal relative position relation and electrical connection, and the thickness at some positions, which is employed, to be overstated
The plotting mode shown is in order to understand, the thickness in accompanying drawing does not represent the proportionate relationship of actual thickness.
Embodiment 1
As shown in Figures 1 to 4, fingerprint recognition detection components of the invention include substrate 1, flexible substrate 2, fingerprint detection member
Part 3, lead 4, fingerprint recognition chip 5, protective layer 6 and touch element 13.
Substrate 1 has the side in the first face a, the second face b corresponding with the first face and the first face of connection and the second face
c.Substrate 1 can be transparent cover plate, such as strengthened glass, safety glass, makrolon, poly- carbon, ceramics or sapphire material.
The preferred high strength material of substrate 1, effectively to protect the element of bottom.In the present embodiment, also formed on the first face a of substrate 1
There is a concave station 1a, flexible substrate 2 and fingerprint detection element 3 are contained in concave station 1a, and the side c of substrate 1 also is provided with an appearance
Put the concave station 1c of flexible substrate 2.Flexible substrate 2 and the total height of fingerprint detection element 3 can match with concave station 1a depth,
For example：Concave station 1a depth can be 50um (micron), but be not limited.In this way so that substrate 1 is scratched in installation
Property base material 2 and fingerprint detection element 3 after integral thickness and length and former base piece 1 it is basically identical, so that product is overall
Slimming.Certainly, the second face of substrate 1 can also set concave station (not shown).
Flexible substrate 2 is arranged on the first face of substrate 1, and along substrate 1 side bending extend to substrate 1 the second face and
The second face of substrate 1 is covered at least in part.In the embodiment of the first face of substrate 1 and side provided with concave station, flexible base
Material 2 is placed in the concave station.The first adhesive layer 11 is provided between flexible substrate 2 and the first face of substrate 1, by flexible substrate 2
It is adhesively fixed in the concave station in the first face of substrate 1 or the first face.Second is provided between flexible substrate 2 and the second face of substrate 1
Adhesive layer 12.Flexible substrate 2 in the present embodiment be flexible PCB or polyethylene terephthalate (PET,
Polyethylene terephthalate), but be not limited.
Fingerprint detection element 3 is located at the first face of substrate 1, is arranged in flexible substrate 2.For example, flexible substrate 2 is provided with
Embossed layer (not shown), impressing layer surface is formed with groove, and fingerprint detection element 3 is arranged in the groove of flexible substrate 2.
Fingerprint detection element 3 can be formed in flexible substrate 2 by way of sputter or silk-screen.The present invention is by fingerprint detection element
3 upper surfaces for being made in substrate 1 are to allow fingerprint detection element 3 can be with the fingerprint of user closer to greatly reducing fingerprint inspection
The distance between electrode and the fingerprint of user for surveying in element 3.The specific constituted mode and operation principle of fingerprint detection element 3 will
It is discussed in detail below.
Lead 4 is arranged in flexible substrate 2, one end electrical connection fingerprint detection element 3 of lead 4, and the other end extends to base
Second face of piece 1, i.e.,：The signal of fingerprint detection element 3 is transferred to the fingerprint in the second face of substrate 1 from the first face of substrate 1
Identification chip 5.In this way, it is to avoid the technique for carrying out punching line on the substrate 1, it is ensured that substrate it is overall strong
Degree.Lead 4 can also be formed in flexible substrate 2 by way of sputter or silk-screen.
Fingerprint recognition chip 5 is generally located at the second face of substrate 1, with user is moved finger and fingerprint detection element 3 it
Between coupling it is sensitive, to receive and handle the data that fingerprint detection element 3 is transmitted.The specific installation site of fingerprint recognition chip 5
Can be the flexible substrate 2 in the second face that substrate 1 is connected to by way of flip-chip, or by way of weld tabs
It is connected between flexible substrate 2 and fingerprint recognition chip 5 and flexible substrate 2 filled with filling glue 7；Certainly, fingerprint recognition core
The installation site of piece 5 can also be integrated with the mainboard 10 electrically connected with lead 4.In order to protect fingerprint recognition chip 5, Ke Yi
One is set to protect base 8, cover lid fingerprint recognition chip 5 on fingerprint recognition chip 5.
The flexible substrate 2 in the first face of the covering fingerprint detection of protective layer 6 element 3 and substrate 1, adequately protect finger easy to wear
Line detecting element 3 and flexible substrate 2.The thickness of protective layer 6 can be 50um, but be not limited.The material of protective layer 6 is class
Bore carbon plated film (Diamond Like Carbon Coating) or high anti-fingerprint AF films etc., but be not limited thoroughly.
Touch element 13 is arranged in flexible substrate 2, and positioned at the second face of substrate.Touch element 13 can be electric capacity
One kind in screen, touch screens, piezoelectric type touch screen, infrared-type touch-screen, surface acoustic wave touch screen etc., but be not limited.
For example：Touch element 13 can be formed in flexible substrate 2 (but being not limited) by techniques such as etching, laminations, so that
Touch element 13, fingerprint detection element 3 and fingerprint recognition chip 5 is set to enhance globality in a piece of flexible substrate 2.Moreover,
Touch element 13 can be arranged on any one side of flexible substrate 2 according to manufacture demand.For example：Touch element 13 is in flexible substrate
In 2 one side, fingerprint recognition chip 5 is on the another side of flexible substrate 2.So touch element 13 can be brought into close contact in flexibility
Between base material 2 and substrate 1 so that substrate 1, fingerprint detection element 3, touch element 13 and flexible substrate 2 being integrally formed
Product, have higher integrated level.
Separately below combine Fig. 5, Fig. 6, Fig. 7 and Fig. 8 correspondence explanation fingerprint detection element four kinds of constituted modes and its
Operation principle.
At least a portion of electrode wiring pattern in fingerprint detection element 3 is made up of conductive grid.Fingerprint detection element 3
Including induction electrode 31 and a plurality of driving electrodes 32 (referring to Fig. 5).As shown in figure 5, fingerprint detection element 3 includes multiple drivings
Electrode 32 and induction electrode 31.A plurality of driving electrodes 32 are arranged side by side and are spaced apart from each other, a plurality of driving electrodes 32 respectively with sense
Answer electrode 31 relative to form multiple detector gaps 35 at interval.Driving electrodes 32 are substantially parallel to each other, and are connected to
Drive circuit 30.Induction electrode 31 is arranged substantially perpendicular to driving electrodes 32.Each driving electrodes 32 pass through detector gap
35 separate with induction electrode 31.Therefore, fingerprint detection element 3 includes being located between each driving electrodes 32 and induction electrode 31
Linearly aligned detector gap 35.
When user is moving up perpendicular to the side of induction electrode 31 or is brandishing finger (for example：Hand is slided along H directions
Refer to), drive circuit 30 sequentially encourages driving electrodes 32 with drive signal.Between the fingerprint ridge and fingerprint valley of fingerprint skim over detection
During gap 35, apply to the drive signal of driving electrodes 32 and be capacitively coupled to sense according to the electric capacity of single detector gap 35
Electrode 31.Electric capacity changes according to the fingerprint ridge and fingerprint valley of the fingerprint for skimming over detector gap 35.Capacitively coupled driving letter
Induction electrode 31 number is coupled to, and a line fingerprint image is provided by sensor circuit detection.By combining multi-slice fingerprint figure
Shape can form complete fingerprint image.
Although the fingerprint detection element 3 of type shown in Fig. 5 is there is provided satisfied performance, easily by parasitic couplings and by
The shadow of the interference coupled by the major part of finger of the noise of human body aggregation and the finger ridge outside gap
Ring.In order to optimize the accuracy of fingerprint recognition, the coupled interference for referring to ridge part outside gap is eliminated, that is, eliminates difference and makes an uproar
Sound, figure 6 illustrates the fingerprint detection element 3 ' of improvement.
Identically with Fig. 5, fingerprint detection element 3 ' (Fig. 6) includes multiple driving electrodes 32 and induction electrode 31.Driving
Electrode 32 is substantially parallel to each other, and is connected to drive circuit 30.Induction electrode 31 is substantially perpendicular to the cloth of driving electrodes 32
Put.Each driving electrodes 32 are spaced apart by the self-inspection drafting board of detector gap 35.Therefore, fingerprint detection element 3 ' includes being located at each
Linearly aligned detector gap 35 between driving electrodes 32 and induction electrode 31.Drive circuit 30 is sequentially swashed with drive signal
Encourage driving electrodes 32.
Fingerprint detection element 3 ' can also include reference electrode 33 and a plurality of illusory driving electrodes 34 (referring to Fig. 6), reference
Electrode 33 is oppositely arranged with induction electrode 31 and positioned at the side opposite with a plurality of driving electrodes 32 of induction electrode 31.A plurality of void
If driving electrodes 34 are arranged side by side and are electrically connected to each other, a plurality of illusory driving electrodes 34 are arranged in correspondence with a plurality of driving electrodes 32
In the side opposite with induction electrode 31 of reference electrode 33.
Fingerprint detection element 3 ' also includes what can be separated substantially parallel to induction electrode 31 and with induction electrode 31
Reference electrode 33.Reference electrode 33 be located at the induction electrode 31 relative with driving electrodes 32 side, and thus by than sensing
The bigger distance of electrode 31 is separated with driving electrodes 32.Reference electrode 33 should be spaced by a segment distance with driving electrodes 32
Open, this distance, which is enough to eliminate for common-mode noise, provides noise and parasitic coupling reference.In some embodiments, reference electrode 33
There can be equal length and width with induction electrode 31, and can abreast be arranged in parallel.Reference electrode 33 is similar to
Induction electrode 31 senses ridge valley signal, but its substantial remitted its fury like that.Because reference electrode 33 and induction electrode 31 are close
Ground interval and with similar size, two electrodes generate roughly equal noise and parasitic signal.From reference electrode 33
On signal in the signal that subtracts on induction electrode 31 generate poor proportional ridge valley signal between the signal sensed,
Due to the relative spacing of two electrodes in detector gap 35, this is significant.But, the noise and parasitism of equal coupling
Signal can be eliminated by subtracting the signal on two electrodes.
Induction electrode 31 and reference electrode 33 are coupled to difference amplifier 38 by difference filter 37.Especially, induced electricity
Pole 31 can be inputted by difference filter 37 coupled to the positive of difference amplifier 38, and reference electrode 33 can pass through difference
Wave filter 37 is coupled to the reverse input of difference amplifier 38.Difference amplifier 38 is by electronically subtracting the He of induction electrode 31
Signal on reference electrode 33 so that noise and parasitic signal are eliminated.
Fingerprint detection element 3 ' can also include the illusory drive circuit being spaced apart with reference electrode 33.As shown in Figure 6,
Illusory drive circuit can include substantial parallel illusory driving electrodes 34, its be placed vertically with reference electrode 33 and by
Gap 36 is spaced apart with reference electrode 33.Parallel illusory driving electrodes 34 are electrically connected to each other by wire 39, and are connected by wire 39
It is connected to drive circuit 30.In some embodiments, relative to reference electrode 33 parallel illusory driving electrodes 34 arrangement
The arrangement of driving electrodes 32 with relative to induction electrode 31.Therefore, the width of parallel illusory driving electrodes 34, parallel illusory drive
The size of spacing and gap 36 between moving electrode 34 can respectively with driving electrodes 32 width, between driving electrodes 32
Spacing is identical with the size of detector gap 35.
Illusory drive circuit can be connected to reference potential during fingerprint image is sensed, for example, be grounded.Therefore, in fingerprint
One in any instant of time of image sensing, driving electrodes 32 can be encouraged by drive signal, and remaining driving electricity
Pole 32 is coupled to reference potential, for example, be grounded.There is the example of 300 driving electrodes 32 for fingerprint detection element 3 ', it is in office
What given time, all driving electrodes 32 in addition to one in 300 driving electrodes 32 are connected to ground connection, and in figure
As any given time during sensing, all parallel illusory driving electrodes 34 of illusory drive circuit are connected to ground connection.Utilize
Noise on the arrangement, earth conductor is coupled substantially equally to induction electrode 31 and reference electrode 33.The noise of coupling leads to
Cross difference amplifier 38 to be subtracted, and thereby be eliminated.Fingerprint image signal of concern is in induction electrode 31 and reference electrode
It is detected, and is not eliminated by difference amplifier 38 between 33.In the present embodiment, induction electrode 31, driving electrodes 32, with reference to electricity
Pole 33 and illusory driving electrodes 34 may be by traditional deposition, etching and photoetching technique and formed.
Typically, the size of detector gap 35 is less than the ridge spacing of typical fingerprint, and general in the range of 25 to 50 μm.
In the present embodiment, the pitch between adjacent driving electrodes 32 is equal to each other and in 50 to 60 μ ms, driving electrodes 32
Width is equal to each other and in 20 to 45 μ ms, and the size of detector gap 35 is equal to each other and in 20 to 40 μ ms.
In an example of fingerprint detection element 3 ', driving electrodes 32 have the width of 25 μm (micron), and adjacent
Driving electrodes 32 between spacing be 25 μm.The size of detector gap 35 is 32 μm.Induction electrode 31 and reference electrode 33 it
Between spacing be 32 μm.The width of the parallel illusory driving electrodes 34 of illusory drive circuit is 25 μm and adjacent illusory driving
Spacing between electrode 34 is 25 μm.The size in gap 36 is 32 μm.Here process parameter is presented merely as illustrative,
It is not intended to limit on the scope of the present invention.
Referring to Fig. 7, fingerprint detection element 300 ' may include a fingerprint sensing region 301 to sense in finger inswept thereon
Line.For different applications, the size and dimension in fingerprint sensing region 301 can optionally change.
In certain embodiments, fingerprint sensing region 301 may include that first induction electrode 303, correspondence first sense
A plurality of first driving electrodes 302 of electrode 303, second induction electrode 310 and correspondence the second induction electrode 310 it is a plurality of
Second driving electrodes 309.First driving electrodes 302 are arranged side by side and are spaced apart from each other, and the first driving electrodes 302 respectively with
First induction electrode 303 is relative to form multiple first detector gaps 306 at interval.Second induction electrode 310 and the first sense
Electrode 303 is answered to be arranged in parallel and positioned at the side opposite with a plurality of first driving electrodes 302 of the first induction electrode 303.Second
Driving electrodes 309 are arranged side by side and are spaced apart from each other, and the second driving electrodes 309 are spaced with the second induction electrode 310 respectively
Turn up the soil relatively to form multiple second detector gaps 313.Second driving electrodes 309 and a plurality of first driving electrodes 302 are accordingly
It is arranged on the second induction electrode 310 side opposite with the first induction electrode 303.
In the present embodiment, the section between pitch and adjacent second driving electrodes 309 between adjacent first driving electrodes 302
Away from being equal to each other and in 50 to 60 μ ms, but it is not limited.The width and the second driving electrodes of first driving electrodes 302
309 width is equal to each other and in 20 to 45 μ ms, but is not limited.Between first detector gap 306 and the second detection
The size of gap 313 is equal to each other and in 20 to 40 μ ms, but is not limited.
Fingermark image can pass through inswept first driving electrodes 302 of finger respectively between the first induction electrode 303
One detector gap 306 and the second driving electrodes 309 the second detector gap 313 respectively between the second induction electrode 310 and produce
It is raw.These signals are combined into fingermark image, similar to the mode that fax imagery is produced using progressive scan.
In certain embodiments, the first driving electrodes 302 are set as that order sends detectable signal one by one.This detectable signal can
Sensed on the first induction electrode 303.Similar to the first driving electrodes 302, the first induction electrode 303 can be and drive circuit
One conductive electrode of 300 connections.
At the first induction electrode 303, response signal can be produced in response to detectable signal.The amplitude of back-signalling can depend on
In whether there is finger in Multiple factors, such as fingerprint sensing region 301, particularly in certain the first driving electrodes 302 and first
Whether ridge or the paddy of fingerprint are just had in the first detector gap 306 between induction electrode 303.At the first induction electrode 303
The amplitude of the response signal of generation can be with the first detector gap between the induction electrode 303 of the first driving electrodes 302 and first
The ridge of finger or the RF impedance of paddy are directly related on 306.
Fingerprint sensing region 301 (including the first driving electrodes 302 and first induction electrode 303) may be with drive circuit
300 electrical connections but actual separation.First induction electrode 303 and the second induction electrode 310 are positioned at outside silicon, or can be subtracted
Static discharge, abrasion and the broken possibility of small sensor, so as to improve the reliability of fingerprint detection element 300 '.So also may be used
According to traditional chips shrink down route map, the cost of fingerprint detection element 300 ' is allowed to be reduced with time.This framework is with directly connecing
Sensor (sensor being incorporated on silicon) is touched compared to there is an obvious advantage, because directly feeler can not be retracted to
It is smaller than professional standard fingerprint width.
In the present embodiment, by sharing the first driving electrodes 302, the second driving electrodes 309, the and of the first induction electrode 303
Second induction electrode 310 constitutes a pair of line imaging device, for producing accurately without deformation fingermark image.Is first passed through by finger
One induction electrode 303 or the second induction electrode 310 determine direction during the inswept fingerprint sensing region 301 of finger, also, logical
Cross and compare the signal intensity of the first induction electrode 303 and the second induction electrode 310 to determine the inswept fingerprint sensing region 301 of finger
When speed (for example：By calculate identical finger-print region by the first induction electrode 303 and the second induction electrode 310 when
Between difference obtain digit speed), obtain more accurately fingermark image with this.
Referring to Fig. 8, fingerprint detection element 300 " may include a fingerprint sensing region 301 to sense in finger inswept thereon
Line.For different applications, the size and dimension in fingerprint sensing region 301 can optionally change.Fingerprint sensing region 301 can be wrapped
Include first induction electrode 303, a plurality of first driving electrodes 302 of the first induction electrode 303 of correspondence, second induced electricity
A plurality of second driving electrodes 309 of the second induction electrode 310 of pole 310 and correspondence.First driving electrodes 302 and the second driving electricity
Pole 309 connects drive circuit 300 respectively.First driving electrodes 302 are arranged side by side and are spaced apart from each other, and the first driving electrodes
302 is relative to form multiple first detector gaps 306 at interval with the first induction electrode 303 respectively.Second induction electrode 310
It is be arranged in parallel with the first induction electrode 303 and positioned at one opposite with a plurality of first driving electrodes 302 of the first induction electrode 303
Side.Second driving electrodes 309 are arranged side by side and are spaced apart from each other, and the second driving electrodes 309 respectively with the second induction electrode
310 is relative to form multiple second detector gaps 313 at interval.Second driving electrodes 309 and a plurality of first driving electrodes 302
It is arranged in correspondence with the second induction electrode 310 side opposite with the first induction electrode 303.
And from unlike Fig. 7, the fingerprint detection element 300 in Fig. 8 " the first induction electrode and the second induction electrode it is equal
Provided with corresponding reference electrode, illusory driving electrodes, difference filter and difference amplifier.
First reference electrode 304 and the first induction electrode 303 are abreast oppositely arranged and positioned at the first induction electrode 303
The side opposite with a plurality of first driving electrodes 302.Similarly, the second reference electrode 311 and the second induction electrode 310 be abreast
It is oppositely arranged and is located at the side opposite with a plurality of second driving electrodes 309 of the second induction electrode 310.
Fingerprint detection element 300 " includes a plurality of first illusory driving electrodes 305 and a plurality of second illusory driving electrodes 312,
A plurality of first illusory driving electrodes 305 are arranged side by side and are electrically connected to each other, a plurality of first illusory driving electrodes 305 and a plurality of first
Driving electrodes 302 are arranged in correspondence with the side opposite with the first induction electrode 303 of the first reference electrode 304, a plurality of second
Illusory driving electrodes 312 are arranged side by side and are electrically connected to each other, a plurality of second illusory driving electrodes 312 and a plurality of second driving electrodes
309 are arranged in correspondence with the side opposite with the second induction electrode 310 of the second reference electrode 311.In the present embodiment, first
The illusory driving electrodes 312 of illusory driving electrodes 305 and second can be all grounded, but be not limited.Fingerprint detection element
300 " difference filter 307, difference amplifier 308, difference filter 314 and difference amplifier 315 are also included.In a reality
Apply in example, difference filter 307, difference amplifier 308, difference filter 314 and difference amplifier 315 can also be formed at
Among (by semiconductor chip production technology) fingerprint detection element 300 ".First induction electrode 303 and the first reference electrode 304
The positive input and reverse input end of difference amplifier 308, difference amplifier are connected to respectively through difference filter 307
307 by electronically subtracting the signal on the first induction electrode 303 and the first reference electrode 304 so that noise and parasitic letter
Number it is eliminated.Similarly, the second induction electrode 310 and the second reference electrode 311 are connected to difference respectively through difference filter 314
Divide the positive input and reverse input end of amplifier 315.Difference amplifier 315 is by electronically subtracting the second induction electrode
310 and the second signal on reference electrode 311 so that noise and parasitic signal are eliminated.
It can be seen that, fingerprint detecting element 300 in Fig. 8 " can effectively disappear on the basis of Fig. 7 fingerprint detection element 300 '
Except noise and parasitic signal, so as to obtain more accurate fingerprint image.
Hereafter illustrated with embodiment illustrated in fig. 2 the present invention fingerprint recognition detection components manufacture it is main
Step：
One substrate 1 is provided, fitted flexible substrate 2 by the first adhesive layer 11 in the first face of substrate 1, in flexible substrate 2
Form lead 4 and fingerprint detection element 3 by way of sputter or silk-screen in advance, and pass through the techniques such as etching, lamination
Form touch element 13；Then the side by flexible substrate 2 along substrate 1 is bent, then fits to substrate 1 by the second adhesive layer 12
The second face, fingerprint recognition chip 5 is welded in the flexible substrate 2 in the second face of substrate 1 so that lead is from the face of substrate 1 first
Fingerprint detection element 3 be connected to fingerprint recognition chip 5 along the side that flexible substrate 2 bypasses substrate 1, by fingerprint detection element 3
Signal be transferred to from the first face of substrate 1 substrate 1 the second face fingerprint recognition chip 5, finally on the face of substrate 1 first
Protective mulch 6 in flexible substrate 2 and fingerprint detection element 3.
With continued reference to Fig. 1 and 2, according to another aspect of the present invention, a kind of electricity detected for fingerprint recognition is also provided
Sub-device (portable terminal or entrance guard device such as mobile phone, ipad), including above-mentioned fingerprint recognition detection components.Substrate 1
For the transparent cover plate of touch display screen, fingerprint detection element 3 is arranged at the non-display area of touch display screen, fingerprint detection element 3
Signal the second face of transparent cover plate is sent to from the first face of transparent cover plate along flexible substrate 2.Touch element 13 is arranged at
The viewing area in the second face of bright cover plate, mainboard 10 connects the flexible substrate of touch element 13 and fingerprint recognition detection components respectively
2.Mainboard 10 can connect flexible substrate 2 by Anisotropically conductive material (ACF) 9.Electronic installation can also include a bonnet, cover lid
Electronic installation back, after cover provided with ring protection wall, ring protection wall cover lid fingerprint recognition chip 5.The electronic installation can be with
Fingerprint recognition, realization principle are carried out on the transparent cover plate of display screen as before, here is omitted.
Embodiment 2
As shown in Figures 9 and 10, another structure of fingerprint recognition detection components of the invention is as follows：Under substrate 100
Surface sets gradually the first substratum transparent 101, the first light transmission conductive layer 102, the first base material 103, the second substratum transparent 104,
Two light transmission conductive layers 105, flexible substrate 106, the second base material 107, and the second substratum transparent 104 and flexible substrate 106 it
Between be additionally provided with fingerprint detection element 110 with the second light transmission conductive layer 105 with layer.Fingerprint detection element 110 and flexible substrate 106
Direction to the non-display area of substrate 100 is extended away, beyond the fingerprint detection element 110 and flexible substrate 106 of substrate 100
(see Fig. 9), the side bending beyond part along substrate 100, the lower surface from substrate 100 covers base by the form of bending
The upper surface of piece 100, and it is fixed on by bonding coat 111 upper surface of substrate 100 (see Figure 10).First light transmission conductive layer
102 and second light transmission conductive layer 105 lead can be passed into the second base material 107 by way of perforation, and led by incorgruous
Electric material (Anisotropic Conductive Film；ACF) it is electrically connected to the mainboard 109 of the lower section of the second base material 107.Fingerprint
Lead is passed the second base material 107 by detecting element 110 also by the mode of perforation, and is electrically connected to by Anisotropically conductive material
Fingerprint recognition chip is integrated with the mainboard 109 of the lower section of second base material 107, mainboard 109.Set on the upper surface of substrate 100
Protective layer 112, covers and protects flexible substrate 106 and fingerprint detection element 110.
Wherein, substrate 100 can be glass or sapphire material etc., but be not limited.First substratum transparent 101 and
Two substratum transparents 104 can be OCA optical cements (Optically Clear Adhesive), but be not limited.
First light transmission conductive layer 102 and the second light transmission conductive layer 105 can be indium tin oxide material (Indium Tin
Oxides, ITO), the viewing area of substrate 100 is generally located at, touch screen structure has been formed.First light transmission conductive layer 102 and
Two light transmission conductive layers 105 include many electrical leads on two different directions respectively, (for example：First light transmission conductive layer 102 is
The a plurality of spaced a plurality of ITO electrode lead of X-direction, the second light transmission conductive layer 105 is that a plurality of Y-direction is spaced a plurality of
ITO electrode lead, and X-direction is mutually perpendicular to Y-direction, but be not limited or other arrangement modes) tactile to realize
Touch the function of screen, the realization principle of associated touch screen, here is omitted.
Flexible substrate 106 can be light-permeable and bent PET material (polyethylene terephthalate), but not with
This is limited.And the base material 107 of the first base material 103 and second equally can be PET material (polyethylene terephthalate), but
It is not limited.
The material of protective layer 112 is that class bores carbon plated film (Diamond Like Carbon Coating) or high anti-fingerprint thoroughly
AF films etc., but be not limited.
Unlike embodiment 1, in the present embodiment, the fingerprint detection element 110 under the lower surface of substrate 100
On flexible substrate 106, by being folded into behind the upper surface of substrate 100, fingerprint detection element 110 is then located at flexible substrate
Under 106.
In summary, fingerprint recognition detection components of the invention and its electronic installation can be realized in such as portable terminal
Deng realizing fingerprint recognition on electronic installation, and need not be but enterprising in the transparent cover plate of such as display screen by physical button
Row fingerprint recognition, extends the practical application of fingerprint recognition, and be particularly suitable for use in Android mobile phone without entity HOME keys etc..
The illustrative embodiments of the present invention are particularly shown and described above.It should be understood that the invention is not restricted to institute
Disclosed embodiment, on the contrary, it is intended to cover comprising various modifications within the scope of the appended claims and equivalent put
Change.
Claims (13)
1. a kind of fingerprint recognition detection components, it is characterised in that including：
Substrate, the second face and connection first face and second face with the first face, corresponding with first face
Side；
Flexible substrate, is arranged on the first face of the substrate, and extends to the of the substrate along the side bending of the substrate
Two faces and the second face for being covered in the substrate at least in part；
Touch element, is arranged in the flexible substrate, and positioned at the second face of the substrate；
Fingerprint detection element, is arranged in the flexible substrate, and positioned at the first face of the substrate；And
Lead, is arranged in the flexible substrate, and one end of the lead electrically connects the fingerprint detection element, other end extension
To the second face of the substrate；
Wherein, the fingerprint detection element includes：
First induction electrode；
A plurality of first driving electrodes, a plurality of first driving electrodes are arranged side by side and are spaced apart from each other, and described a plurality of first drives
Moving electrode is relative to form multiple first detector gaps at interval with first induction electrode respectively；
Second induction electrode, be arranged in parallel with first induction electrode and be located at first induction electrode with it is described a plurality of
The opposite side of first driving electrodes；
A plurality of second driving electrodes, a plurality of second driving electrodes are arranged side by side and are spaced apart from each other, and described a plurality of second drives
Moving electrode is relative to form multiple second detector gaps at interval with second induction electrode respectively, and described a plurality of second drives
Moving electrode is arranged in correspondence with second induction electrode and first induction electrode with a plurality of first driving electrodes
Opposite side；
The fingerprint detection element also includes the first reference electrode and the second reference electrode, first reference electrode and described the
One induction electrode is abreast oppositely arranged and positioned at the opposite with a plurality of first driving electrodes of first induction electrode
Side, second reference electrode is abreast oppositely arranged with second induction electrode and positioned at second induction electrode
The side opposite with a plurality of second driving electrodes；
The fingerprint detection element also includes a plurality of first illusory driving electrodes and a plurality of second illusory driving electrodes, described a plurality of
First illusory driving electrodes are arranged side by side and are electrically connected to each other, and a plurality of first illusory driving electrodes are driven with described a plurality of first
Moving electrode is arranged in correspondence with the side opposite with first induction electrode of first reference electrode, described a plurality of second
Illusory driving electrodes are arranged side by side and are electrically connected to each other, a plurality of second illusory driving electrodes and a plurality of second driving electricity
Pole is arranged in correspondence with the side opposite with second induction electrode of second reference electrode；
The pitch between pitch and adjacent second driving electrodes between adjacent first driving electrodes is equal to each other.
2. fingerprint recognition detection components as claimed in claim 1, it is characterised in that：Pitch between adjacent first driving electrodes
And the pitch between adjacent second driving electrodes is in 50 to 60 μ ms；The width of first driving electrodes and the second driving electricity
The width of pole is equal to each other and in 20 to 45 μ ms；The size of first detector gap and the second detector gap be equal to each other and
In 20 to 40 μ ms.
3. fingerprint recognition detection components as claimed in claim 1, it is characterised in that：The touch element at least includes
Second light transmission conductive layer, is formed in the flexible substrate, including many electrical leads arranged in parallel in the first direction；
The first base material, is formed in second light transmission conductive layer；And
First light transmission conductive layer, is formed in the first base material, including many electrical leads arranged in parallel in a second direction；
Wherein, second light transmission conductive layer and fingerprint detection element are located at same between the first base material and flexible substrate
Layer.
4. fingerprint recognition detection components as claimed in claim 3, it is characterised in that：The fingerprint detection element is with the flexibility
Base material, the side bending from the first face of the substrate along the substrate extends to the second face of the substrate.
5. fingerprint recognition detection components as claimed in claim 1, it is characterised in that：The induction electrode of the fingerprint detection element
It is made up of with pattern at least a portion of driving electrodes formation conductive grid.
6. fingerprint recognition detection components as claimed in claim 1, it is characterised in that：The fingerprint detection element and lead pass through
The mode of sputter or silk-screen is formed in flexible substrate.
7. fingerprint recognition detection components as claimed in claim 1, it is characterised in that：Form fluted in the flexible substrate,
The fingerprint detection element is arranged in the groove, and the first face and side of the substrate are equipped with the accommodating flexible substrate
Concave station.
8. fingerprint recognition detection components as claimed in claim 1, it is characterised in that：Also include a fingerprint recognition chip, set
Flexible substrate in the second face of the substrate, the fingerprint recognition chip moves finger and the fingerprint detection element to user
Between coupling it is sensitive.
9. fingerprint recognition detection components as claimed in claim 1, it is characterised in that：The of the flexible substrate and the substrate
The first adhesive layer is provided between simultaneously；The second adhesive layer is provided between the flexible substrate and the second face of the substrate.
10. fingerprint recognition detection components as claimed in claim 1, it is characterised in that：The touch element is located at the flexibility
Between base material and the substrate.
11. fingerprint recognition detection components as claimed in claim 1, it is characterised in that：Also include a protective layer, at least cover institute
The flexible substrate in the first face of fingerprint detection element and the substrate is stated, the protective layer is that class bores carbon plated film or high anti-fingerprint thoroughly
AF films.
12. a kind of electronic installation that function is detected with fingerprint recognition, including as described in any one in claim 1 to 11
Fingerprint recognition detection components.
13. the electronic installation of function is detected with fingerprint recognition as claimed in claim 12, it is characterised in that：The substrate is
The transparent cover plate of touch display screen, the fingerprint detection element is arranged at the non-display area of the touch display screen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410313528.4A CN104036172B (en) | 2014-07-02 | 2014-07-02 | Fingerprint recognition detection components and its electronic installation |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410313528.4A CN104036172B (en) | 2014-07-02 | 2014-07-02 | Fingerprint recognition detection components and its electronic installation |
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| CN104036172B true CN104036172B (en) | 2017-08-08 |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104700083B (en) * | 2015-03-06 | 2019-06-07 | 南昌欧菲生物识别技术有限公司 | Fingerprint identification device and its manufacturing method, touch screen, terminal device |
| CN104766048B (en) * | 2015-03-06 | 2019-02-12 | 南昌欧菲生物识别技术有限公司 | Fingerprint identification device and its manufacturing method, touch screen, terminal device |
| CN104751135A (en) * | 2015-03-06 | 2015-07-01 | 南昌欧菲生物识别技术有限公司 | Fingerprint identification device, touch screen and electronic equipment |
| CN105138958B (en) * | 2015-07-27 | 2020-06-23 | 联想(北京)有限公司 | Electronic equipment, display screen and panel |
| CN105654076B (en) * | 2016-04-06 | 2022-06-14 | 昆山丘钛生物识别科技有限公司 | Front multifunctional integrated fingerprint identification module |
| CN107016340A (en) * | 2017-03-01 | 2017-08-04 | 广东欧珀移动通信有限公司 | Input module and electronic installation |
| CN107256067B (en) | 2017-05-12 | 2021-03-09 | Oppo广东移动通信有限公司 | Display device and mobile terminal |
| CN109426774B (en) * | 2017-08-25 | 2022-05-03 | 京东方科技集团股份有限公司 | Display device, display panel, manufacturing method of display panel and driving method of display panel |
| WO2021109045A1 (en) * | 2019-12-04 | 2021-06-10 | 深圳市汇顶科技股份有限公司 | Under-screen fingerprint collection device, lcd touch screen, and electronic device |
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| CN2696049Y (en) * | 2004-04-22 | 2005-04-27 | 叶军 | Semiconductor fingerprint collecting device |
| CN103530609A (en) * | 2013-10-11 | 2014-01-22 | 北京京东方光电科技有限公司 | Fingerprint identification element, display screen and display device |
| CN203930882U (en) * | 2014-07-02 | 2014-11-05 | 南昌欧菲生物识别技术有限公司 | Fingerprint recognition detection components and electronic installation thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8786033B2 (en) * | 2006-09-01 | 2014-07-22 | IVI Holdings, Ltd. | Biometric sensor and sensor panel, method for detecting biometric pattern using the same, and method for manufacturing the same |
| US8866347B2 (en) * | 2010-01-15 | 2014-10-21 | Idex Asa | Biometric image sensing |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2696049Y (en) * | 2004-04-22 | 2005-04-27 | 叶军 | Semiconductor fingerprint collecting device |
| CN103530609A (en) * | 2013-10-11 | 2014-01-22 | 北京京东方光电科技有限公司 | Fingerprint identification element, display screen and display device |
| CN203930882U (en) * | 2014-07-02 | 2014-11-05 | 南昌欧菲生物识别技术有限公司 | Fingerprint recognition detection components and electronic installation thereof |
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